import turtle
t = turtle.Turtle()
t.fillcolor("blue")
t.begin_fill()
for _ in range (4):
    t.forward(100)
    t.left(90)
t.right(90)
for _ in range (4):
    t.forward(100)
    t.left(90)
t.forward(100)
for _ in range (4):
    t.forward(100)
    t.left(90)
t.left(180)
for _ in range (4):
    t.forward(100)
    t.left(90)
t.end_fill()
turtle.done()
